diff --git a/StanHeaders/inst/include/upstream b/StanHeaders/inst/include/upstream
index 1b09798b5..fb24b6428 160000
--- a/StanHeaders/inst/include/upstream
+++ b/StanHeaders/inst/include/upstream
@@ -1 +1 @@
-Subproject commit 1b09798b57c19212659f2e8f085b1f873722c5e8
+Subproject commit fb24b642879e4e00d176a841bd7485c6417ef93c